Solved the problem with alphanumeric codes

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/microdataes@13 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Solved the problem with alphanumeric codes

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/microdataes@14 edb9625f-4e0d-4859-8d74-9fd3b1da38cb